webber is a configurable python and php system that allows you to easily display jabber presence information on a webpage:

“Webber is a multi-user Jabber presence indicator for the web. It is
split up into two parts. Webberbot is a bot written in python which
connects to a jabber server and stores presence information in a MySQL
database. webber.php is a PHP script which you can include in your
webpage to display your presence on the web.”

i wonder how tough it would be to hack in support for geographic metadata and a map display, similar to the jabber world map.